nmn

Kuglerina rotundata


Classification: pf_mesozoic -> Rugoglobigerinidae -> Kuglerina -> Kuglerina rotundata
Sister taxa: K. rotundata, K. sp.,

Taxonomy

Citation: Kuglerina rotundata (Bronnimann, 1952)
Rank: Species
Basionym: Rugoglobigerina rugosa rotundata
Synonyms: Helvetiella atlantica; Globotruncana (Rugoglobigerina) rotundata subrotundata

Type images:

Original description: "The large, occasionally subspherical test starts with a low, trochoidal spiral which is followed in the adult by a somewhat higher volution with 5-6 chambers increasing little in size. The chambers of the last whorl are truncate at the apertural side, rounded at the periphery and much elongated in axial direction. The spiral side, with about 2 whorls, is usually slightly depressed. The aperture, as seen in the end chamber, is large, arcuate and opens into the deep and narrow umbilicus. The covering plate seems to be absent. The deep sutures are straight on the umbilical side, and straight to slightly curved on the spiral side. The surface is ornamented by numerous coarse pustules and small ridges arranged in an indistinct meridional pattern. All the investigated specimens are dextrally coiling."

Entries in the Catalog of original descriptions: Rugoglobigerina rugosa rotundata, Helvetiella atlantica, Globotruncana (Rugoglobigerina) rotundata subrotundata

Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.30Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. gansseri zone (71.75-72.97Ma, base in Campanian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Kuglerina rotundata, synonyms included - Archaeoglobigerina rotundata; Globotruncana rotundata subrotundata; Helvetiella atlantica; Kuglerina rotundata; Rugoglobigerina rotundata; Rugoglobigerina subrotundata; space-time plot :: Samples map :: Parent: Kuglerina

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical
    sp chamber shape:Globularcoiling axis:Moderateperiphery:N/Aaperture border:Tegilla
    umb chbr shape:Globularumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:Infralaminal
    spiral sutures:Moderately depressedumb depth:Deepwall texture:Meridional costellaeshell porosity:Finely Perforate: 1-2.5µm
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:5.0-6.0 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Brönnimann, P. (1952c). Globigerinidae from the Upper Cretaceous (Cenomanian-Maestrichtian) of Trinidad, B. W. I. Bulletin of American Paleontology. 34(140): 1-70. gs


    logo

    Kuglerina rotundata compiled by the pforams@mikrotax project team viewed: 20-8-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/pforams/index.php?id=110298 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics